Starting November 1, Samsung has been rolling out Blue Coral version of Samsung Galaxy S7 to US carriers and select markets. So the real news is Blue Coral is now official in America.
Currently, there is no exact date of release and possibly all four major carriers will launch these. The other four variants are Black, Silver, Gold, and Pink Gold).
We assume that Samsung Galaxy S7 edge Blue Coral variant will run Android Marshmallow as the company has yet not announced for Nougat update.